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A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies. Unlike large dams which create reservoirs, the goal of building a weir across a river isn’t to create storage, but only to gain some control over the water level. Over time, the term weir has taken on a more general definition in engineering to apply to any hydraulic control structure that allows water to flow over its top, often called its crest. In fact, the spillways of many large dams use weirs as control structures. So how do they work?
- Subjects:
- Hydraulic Engineering
- Keywords:
- Dams Hydraulics Weirs
- Resource Type:
- Video
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Video
Chances are you'll need to find a scholarly journal article for a research paper or project in the near future. But, wait, what is a "scholarly journal article?" How is it different from a popular source like a newspaper or magazine article? Let's reduce the confusion on scholarly journal articles. Scholarly journals enable scholars -- experts in a particular academic field -- to communicate their research with other experts in that field through publishing articles and to stay current by reading about other scholars' work. Consequently, scholarly journals create a community of scholars who are all participating in a kind of "conversation" in that academic field. Rather than a face-to-face conversation, this is a formal conversation, which takes place over months and years through written documents. The most important part of this long term written conversation - what makes it a “scholarly” conversation, as opposed to popular - is what's called the “peer review process.” The peer review process works like this: in order for a scholar to get published in a scholarly journal, his or her expert peers must read their work and critique it. These “peer reviewers” make sure that the scholar has cited the appropriate experts in the discipline, made valid and well-supported arguments, and has written the article on a topic that is appropriate for that particular journal. This rigorous evaluation process ensures that scholarly work meets a higher standard than popular publications. So, why is this important for you? First, the information in a scholarly text has been rigorously evaluated, so it is more reliable and credible than information in popular sources. Second, reading scholarly journal articles for your papers or projects can give you insight into the ways of thinking of experts in that field. Finally, every scholarly text has extensive bibliographies that introduce you to important texts in the field, which can help you extend your research in that area. When you read the articles and books the scholar cited in her article, you are taking part in the scholarly conversation.
- Keywords:
- Scholarly periodicals Scholarly publishing
- Resource Type:
- Video
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Video
In this video, Mr Peter Sidorko, the University Librarian of the University of Hong Kong explain the importance of academic integrity. Students are expected to conduct themselves honesty and with integrity. One of the key responsibilities is to assure to credit the materials used to develop the ideas and academic work properly and avoid plagiarism.
- Keywords:
- Intellectual property Plagiarism Information literacy Academic writing
- Resource Type:
- Video
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Video
Architects, engineers and developers are creating increasingly greener structures - and doing it in a more literal way than ever before. This is what happens when trees meet buildings.
- Subjects:
- Environmental Engineering, Building Services Engineering, and Building and Real Estate
- Keywords:
- Buildings -- Energy conservation Roof gardening Sustainable buildings Sustainable construction Trees in cities
- Resource Type:
- Video
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Video
This video explains why ridges move, and other musings on thermal movement of large civil works. Most people have a certain intuition about thermal expansion, but you may not have considered how engineers design to accommodate it on large civil structures. The video gives a quick overview on this important consideration that engineers must account for when designing infrastructure like pipelines, bridges, and even sidewalks.
- Subjects:
- Structural Engineering
- Keywords:
- Structural analysis (Engineering) Expansion (Heat)
- Resource Type:
- Video
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Video
This video discusses the topic of urban sprawl and the environmental and social impact if a city is expanding too fast
- Subjects:
- Building and Real Estate
- Keywords:
- Cities towns -- Growth Housing policy Buildings -- Height restrictions City planning
- Resource Type:
- Video
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Video
This video shows more destructive testing to answer your questions about concrete. Concrete's greatest weakness is its tensile strength, which can be less than 10% of its compressive strength. So, we often reinforce it to create a composite material strong against all types of stress. This video briefly touches on conventional rebar and prestressed/post-tensioned reinforcement.
- Subjects:
- Building and Real Estate
- Keywords:
- Reinforced concrete Concrete
- Resource Type:
- Video
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Video
This video explains how GPS works, security issues of GPS, and why US military GPS can be made free for use.
- Subjects:
- Land Surveying and Geo-Informatics
- Keywords:
- Global Positioning System Artificial satellites in navigation
- Resource Type:
- Video
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Video
This video shows how simple reinforcement is used to prevent collapse of rock tunnels. Tunnels play an important role in our constructed environment as passageways for mines, conveyance for utilities, and routes for transportation. Rock bolts are a type of reinforcement for stabilizing rock excavations, usually made from steel bars or bolts. This simple construction method dramatically reduces the cost of making tunnels through rock safe from collapse.
- Subjects:
- Structural Engineering
- Keywords:
- Underground construction Rock bolts Tunneling Tunnels
- Resource Type:
- Video
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Video
Earthquakes have always been a terrifying phenomenon, and they’ve become more deadly as our cities have grown — with collapsing buildings posing one of the largest risks. But why do buildings collapse in an earthquake? And how can it be prevented? Vicki V. May explains the physics of why it is not the sturdiest buildings, but the smartest, that will remain standing.
- Subjects:
- Building and Real Estate and Disaster Control and Management
- Keywords:
- Building failures -- Prevention Earthquake resistant design Earthquake engineering Buildings -- Earthquake effects
- Resource Type:
- Video